You’re getting further than I do - don’t get to the Japan Update screens at all. CTDs from the copyright screen and returns to the Steam platform.
I’ve raised a ticket with Zendesk and I’ve provided them with the Application-level event viewer logs. Also done a feature update on Windows, no change at all. Never had anything like this before, it’s almost as if something has timed out within the code because on the face of it, there are no updates which could have caused it.